Wrench



Jim 9, 1925.

J. W. KAOUGH WRENCH Filed Nov. 8. 1925 2 Sheet-Sheet 1 June 9, 1%25.

J. W. KAOUGH WRENCH Filed Nov. 1 5 ZSheets-Sheet 2 attorney Patented June 9, 1925.

UNITED STATES 1,541,225 PATENT OFFICE.

JOSEPH W. KAOUGH, OF DALLAS, TEXAS, ASSIGNO'R TO THE GUIBERSON CORPORA- TION, OF DALLAS, TEXAS, A. CORPORATION OF DELAWARE.

WRENCH.

Application filed November 8, 1923. Serial No. 673,610.

To all whom it may concern:

Be it known that I, J OSEIH W. KAoUcH, citizen of the United States of America, residing at Dallas, in the county of Dallas and State of Texas, have invented certain new and useful Improvements in lVrenches, of which the following is a specification.

This invention relates to new and useful improvements in wrenches.

The invention has particularly to do with that type of wrenchwhich is designed for gripped.

A particular object of the invention is to provide in combination with its shoes, detachable jaw closing fingers which permit of a proper locationof the fingers with re-- spect to the shoes or jaws. 1 j

A further ob ct is to provide a self-engaging latch for the free ends of the clamping jaws together with an inter-meshlng arrangement, whereby the free ends of the jaws are prevented from sagglng when clamped in a horizontal plane about a pipe.

A very important object is to provide a wrench of the self-acting jaw type which will be readily adjustable to various pipe sizes, particularly small diameters.-

A construction designed to carry out the invention will be hereinafter described to gether with other features of the invention.

The invention will be more readily understood from a reading of the following specification and by reference to the accompanying drawings, in which an exampleof the invention is shown, and wherein:

Fig. 1 is a plan view of a wrench constructed in accordance with my invention,

Fig. 2 is a side elevation of the same,

Fig. 3 is a sectional view on the line '33 of Fig. 1, i

Fig. 1 is an enlarged plan view of the and have lugs 30 engaging over the outer head and jaws of the wrench, and

through the head. The head has a concavedj seat 14 at its forward portion. A lug 15 is formed on the extreme left hand end of the head, (Fig. 5), while inwardly offset ears 16 (Fig. 2) are provided on the extreme right hand end of the head.

A gripping jaw 17 has a reduced ear 18 fitting between the ears 16 as is shown in Fig. 2. A. bolt 19 passing through the cars 16 and 18 acts as a pivot for the jaw. The jaw has a flange 17 conforming to the seat and substantially flush with the cheek plates. A coiled spring 20 secured in the head attached to the free end ofthe jaw 17 and tends to hold the flange 17 seated.

A pair of clamping jaws 21 and 22, respectively, are mounted on the head. jaw 21 has ears 3 counter-sunk in the ears 16 and mounted on the bolt 19, so as to be substantially flush with the cheek plates. The jaw 22 has cars 24 engaging on a bolt 19 passing through the lug 15. The free end ofthe 'jaw22 has a converging socket 25whicl1 receives the reduced and beveled end 26" of the jaw '21 at the center of the wrench, whereby sagging of the jaws is prevented. The jaw 21 has a hook latch 26 onv its reduced end which engages in a keeper 27 The keeper is pivoted on the free endof the jaw 22.. A yoke spring '28 has one end straddling the latching-end of the keeper and its inner end embracing the jaw 22, while the sides of the spring are coiled about the pivot of the keeper. The ends of the hook and keeper are sufficiently rounded to cause an easy selflatching action when the clamping jaws are swung together.

An important feature resides in removable jaw closing fingers 29 and 30, respectively, arranged in pairs straddling the cheek plates. The fingers 29'are fastened to the ears 23 of the jaw 21 by screws 31 and each finger has a laterally extending lug 29" engaging over the back or outer edge of the jaw 21, so that pressure against the fingers is also sustained by said lugs. The fingers 30 are fastened to the ears 2% by screws 31 5 is aview of the opposite side from V edge of the jaw 22. The jaws 21 and 22 have stops 21 and 22, respectively on their ears, which engage the head and limit the outward swing of said jaws.

This type of wrench lends itself readily to numerous adustments whereb a wide range of pipe sizes may be engaged. A curved shoe 32 may be fastened to the face of the flange 17 for reducing the inner diameter of the jaws. It is possible to use various means for fastening shoes to the jaws and I have shown the shoe 32 fastened with a machine bolt 33, while for smaller diameters shoe 3% is fastened to the jaw '21 and a shoe is secured to the jaw 22. The shoe 34 is shown provided with lips 36 overlapping the jaw 21 and fastened by machine bolts 37, while the shoe is fastened by a' machine bolt 38 inserted through the,

jaw 22, instead of being counte sunk as is the bolt 33. Any desired fastening may be selected.

It will be noted that the fingers 29 and 30 are set so as to project inwardly of the jaws and .co-act with the faces of the shoes. This is necessary in order that the clamping shoes may be fully closed by the engagement of the pipe with the fingers. The fingers being detachable may be removed. Thus when a larger size of pipe was to be worked upon one of the shoes would be removed and the fingers would have to be positioned accordingly. Another set of fingers for this purpose could be readily substituted and the user would not be required to purchase a larger size or a smaller size wrench under usual conditions.

In case a finger is broken or battered it may be replaced. In some instances it might be desired to close the jaw 22 by hand and therefore the fingers 30 could be omitted. The detachable fingers offer a very flexible arrangement and while I have shown them secured with screws and provided with sustaining lugs, they could be otherwise attached and formed.

The gripping jaw 17 has an inner curved face 39 in position to be engaged by a displacing member 4c0 on the innner end of a handle as mounted on a pin 4C1 secured in the head. The member 40 is sutficiently broad to displace the jaw 17 from the seat la and into gripping position when the handle is swung. "While I have shown the handie and the member l0, it is to be understood that any means may be used for displacing the jaw 17.

It is desirable to hold the handle 42 against swinging and the head in a central v position and while any suitable means may be iised for this purpose, I have found a spring latch bolt to give satisfactory results. On the handle is mounted a housing 4A in which a pair of headed bolts it) are mounted to slide.

The cheek plate on this side has a stud 4:6 on its inner end relatively between the bolts. Each bolt has a coiled compression spring 4-7 confined thereon and bearing against the housing and tending to withdraw the bolts from the path of the stud. An abutment plate 48 is fastened on the handle e2. Each belt at?) has a hand hook 4t?) and by grasping either of these, the bolt thereof may be displaced against the tension of its spring 47 and caught against the edge of the plate 48, whereby the head of the bolt will be held in the path of the stud. By displacing both bolts the head 10 and the handle will. be engaged for unitary movement. When only one of the bolts is displaced the handle is free to independently in one direction only. As is shown in Fig. 1 the right hand bolt is displaced and when the handle swung to the left the head will also be swung therewith, but when the handle is swung to the right the head 10 will remain (relatiwly) stationary and the member 40 will fulcrum on its pin l1, forcing the jaw 17 into action.

In using the wrench the clamping aws 2i and 22 are swung open is shown in full lines in Fi g. 4. The head 10 is moved toward the pipe which is engaged by the fingers 29 and 30, which latter were swung into its path when the jaws were opened. As the movement of the head toward the pipe is continued the fingers are displaced, whereby the jaws 21 and 22 are swung in behind the pipe until the hook 26 engages in the keeper 27 and theclamping aws are thus fastened as 18 shown 1n dottedhnes 1n Fig. 4t and in full lines 1n Flg. 1.

The bolts 45 are both engaged with the lug 46 during the jaw-closing movement, but in order to swing the member 40 and displace the jaw 17 to grip the pipe, one of the bolts .45 must be retracted, according to the direction in which, it is necessary to swing the handle 42. When the handle is released it may be swung and the pipe firmly gripped.

It is obvious that other latchingmeans could be used and various other changes, modifications and alterations may be made within the scope of the appended claims.

hat I claim, is:

1. In a wrench, a head having a seat, a gripping jaw pivoted in the head, means for displacing the gripping jaw into gripping osition, a pair of clamping aws hinged to the head and co-acting with the gripping jaw, and aw closing fingers detach-ably connected with one of the clamping aws.

2. In a wrench, a head having a seat, a gripping jaw pivoted in the head, means for displacing the gripping jaw into gripping position, a pair of clamping jaws hinged to the head and co-acting with the gripping jaw, jaw closing fingers detachably connected with one of the clamping jaws, and means for fastening the free ends of the clamping jaws together.

3. In a wrench, a head having a seat, a gripping jaw pivoted in the head, means for displacing the gripping into gripping position, a pair of clamping jaws hinged to the head and co-acting with the gripping jaw, jaw closing fingers detachably connected with one ofthe clamping awe, and means for fastening the free ends of the clamping jaws together, one of the clamping jaws having a socket on its free end for receiving the free end of the other clamping jaw.

i. In a "wrench, a head having a seat, a gripping jaw pivoted in the head, means for displacing the gripping jaw into gripping position, a pair of clamping jaws hinged to the head and (to-acting with the grippingjaw, and jaw closing fingers on both clamp ing jaws detachably attached thereto.

5. In a wrench, a head having a seat, a gripping jaw pivoted in the head, means for displacing the gripping jaw into gripping position, a pair of clamping jaws hinged to the head and co-acting with thegripping jaw, jaw closing fingers on both clamping jaws detachabiy attached thereto, and a selflatching keeper carried by one of the clamping jaws and engaged by the other clamping jaw.

(S. In a wrench, the combination of a head having a seat, a gripping jaw pivoted in the head and swinging through said seat, a curved shoe detachably mounted on said gripping jaw, a pair of clamping jaws pivoted to the head and co-acting with the shoe to grip an article, means for fastening the clamping jaws together, jaw closing fingers detachably mounted on the pivoted ends of the clamping jaws, and means for actuating the gripping jaw.

7. In a wrench, the combination of a head having a seat, a gripping jaw pivoted in the head and swinging through said seat, a curved shoe detachably mounted on said gripping jaw, a pair of clamping jaws pivoted to the head and co-acting with the shoe to grip an article, means for fastening the clamping jaws together, jaw closing fingers detachably mounted on the pivoted ends of the clamping jaws, means for actuating the gripping jaw, and additional curved shoes detachably mounted on the inner faces of the clamping jaws.

8. In a wrenclnthe combination of a head having a seat, a gripping jaw pivoted in the head and swinging through said seat, a curved shoe mounted on said gripping jaw, a pair of clamping jaws pivoted on said head, additional curved shoes mounted on the clamping jaws, jaw closing fingers detachably mounted on the pivoted ends of the clamping jaws and co-acting with the shoes,

means for connecting the free ends of the clamping jaws, and means including a handle for displacing the gripping j aw into grlpplng position.

In testimony whereof I afiix my signature.

JOSEPH W. KAOUGH. 

